War Machinist Dealing Double Damage

War Machinist with Tinkerer's Robe is dealing 2 damage to the targeted troop instead of the 1 damage the card says it should be dealing.

It also doesn't seem to be doing the 1 damage to the champion the card says it should be doing when an artifact enters play, so it seems like both the damage that should be going to the champion AND the damage that should be going to the targeted troop are BOTH going to the targeted troop.

This happened to me when playing against the Ballistics Expert in the arena. He had a war machinist with a tinkerer's robe, played a charge bot, targeted my Kraken Guard Mariner (2/2) and killed it. Played another charge bot, targeted my Princess Victoria (1/2) and killed that.